America's Cup 2013 two finalist hydrofoil catamarans "Oracle Team USA" and "Emirates Team New Zealand" racing neck and neck on the San Francisco Bay.­

The sail of the AC72-class hydrofoil catamarans is a rigid wing made of carbon fiber.­ When hydro-foiling, those sailboats can go about twice as fast as the wind.­

For more photos and info about the America's Cup race and the AC72-class hydrofoil catamarans, go to the album description./­a>.­

More images of ▶
AC72advertisingamerica's cupbayboatscatamaransemirates team new zealandfastfoilinghelicopterhydrofoil catamaranshydrofoilinghydrofoilsoceanoracle team USAraceracingsailboatsailingsailing hydrofoilsseashipsspeedsponsorstwowater